<template>
  <div class="star" :class="starType">
      <span v-for="itemClass in itemClasses" :class="itemClass" class="star-item"></span>
  </div>
</template>

<script type="text/ecmascript-6">
  const LENGTH = 5
  const CLS_ON = 'on'
  const CLS_HALF = 'half'
  const CLS_OFF = 'off'

  export default {
    props: {
      size: {
        type: Number
      },
      score: {
        type: Number
      }
    },
    computed: {
      starType() {
        return 'star-' + this.size
      },
      itemClasses() {
        let result = []
        let score = Math.floor(this.score * 2) / 2
        let hasDecimal = score % 1 !== 0
        let integer = Math.floor(score)
        for (let i = 0; i < integer; i++) {
          result.push(CLS_ON)
        }
        if (hasDecimal) {
          result.push(CLS_HALF)
        }
        while (result.length < LENGTH) {
          result.push(CLS_OFF)
        }
        return result
      }
    }
  }
</script>

<style lang="stylus" rel="stylesheet/stylus">
    @import "../../common/stylus/mixin.styl"
    .star
      .star-item
        display :inline-block
        background-repeat : no-repeat
      &.star-48
        .star-item
          width:20px
          height:20px
          margin-right :22px
          background-size : 20px 20px
          &:last-child
            margin-right :0
          &.on
            bg-image('star48_on')
          &.half
            bg-image('star48_half')
          &.off
            bg-image('star48_off')
      &.star-36
        .star-item
          width:15px
          height:15px
          margin-right :16px
          background-size : 15px 15px
          @media only screen and (max-width: 375px) 
            margin-right: 8px;
          &:last-child
            margin-right :0
          &.on
            bg-image('star36_on')
          &.half
            bg-image('star36_half')
          &.off
            bg-image('star36_off')
      &.star-24
        .star-item
          width:10px
          height:10px
          margin-right :3px
          background-size : 10px 10px
          &:last-child
            margin-right :0
          &.on
            bg-image('star24_on')
          &.half
            bg-image('star24_half')
          &.off
            bg-image('star24_off')
</style>
